Wrench



W. L. STOVER.

WRENCH.

APPLICATION FILED APR-23,1919.

' 1,337, 102, Patented Apr. 13, 1920.

WILLARD L. STOVER, OE AMARILLO, TEXAS.

WRENCH.

Specification of Letters Patent.

Patented A M-.13, 1920.

Application filed April 23, 1919. Serial No. 292,101.

To all whom it may concern.-

Be it knownthat I, lViLLAnnL. brovnn,

a citizen of the United States, residing at Amarillo, in the county of Potter and State ofTexas, have invented a new and useful Vrench, of which the following is a specification.

My invention relates to wrenches and has as its principal object to provide a wrench for applying and removing w ll drill bits or other heavy machine parts.

A further object of the inventionis to pr vide a wrench to facilitate the engagement and disengagement of the drill bit from the drill.

Another object ofthe present invention is to provide a wrench of the above character which does not possess any cumbersome parts and which may be handled with great facility in removing heavy drill bits from the drill.

It is another object of this invention to provide a drill bit wrench which embodies a stationary supporting ring and rotatable jaw associated therewith, together with antifriction means interposed'betwen the two members, the anti-friction means so arranged as to permit the same to be readily lubricated.

An additional object of the invention is to provide a wrench for handling heavy drill bits which is simple in construction, consists of few parts that may be readily assembled and disassembled and which may be manufactured and sold at a minimum cost.

The above and other objects and advantages of the invention will become fully apparent from the following specification and drawing, the inventive features being explicitly defined in the subjoined claims.

The invention consists of combinations, arrangement of parts, operations and gen eral assemblage which will be hereinafter specifically referred to and illustrated in the accompanying drawings wherein: I

Figure l is a side elevation of my improved wrench in operative position;

Fig. 2 is a bottom plan view of the wrench disengaged from the drill bit, the parts being in position for the reception of the drill bits or to permit the disengagement of the same from the wrench; and

Fig. 3 is a transverse sectional view of the device taken on line 3-3 of Fig. 2.

Referring to the drawing wherein like characters of reference designate like parts in all the views, the numeral 5 designates a swinging. or rotary jaw which is adapted to embracethe drill-bit. The jaw 5 is annular and is of a relatively great thickness. An openingG of a size and shape to receive the drill-bit is formed in the jaw 5.

Formedin the peripheral edge of the jaw 5 and extending circumferentially of the same is an annular groove 7.

Loosely disposed in the groove 7 is a split supporting ring 8, The opening in this ring Sis of the same width as the opening (3 in the aw 5, and is adapted to register with the latter opening to permit engagement or disengagement of the drillbit in this opening. The upper face of the ring 8 is provided with spaced recesses 9 in which antifriction roller bearings 10 are mounted which contact with the upper wall of the groove 7 and support the jaw 5. Handles 11 are mounted upon the jaw 5 whereby the jaw is rotated on the ring 8 An annular plate 12 of the same width as therotary jaw 5 is attached to the outer face of this jaw 5 after the annulus 8 is placed in position in the annular groove 7 This plate 12 is attached to the movable jaw by screws or other fastenings 13.

Part of the well-drilling apparatus is illustrated, with which my improved wrench is to be associated in removing the drill-bit from the drill stock designated at A. The well-drilling apparatus being designated at it and includes parallel standards 15 which are engaged in recesses 16 formed in the supporting ring 8 at diametrically opposite points.

In the use of the device the jaw and supporting ring are arranged so that the openings are in register and the drillbit engaged in the same. The jaw 5 is then rotated by the handles 11 while the supporting ring is held stationary by the standards 13. The weight of the drill-bit causes the movable jaw to rest on the roller bearings 10 and thereby prevents friction between the and the supporting ring.

The embodiment of the invention is considered to be the preferred construction but I wish it understood that the invention is susceptible to various modifications and alterations and that my limits of modification are only governed by the herewith appended claims.

What I consider new and desire to protect by Letters Patent is 1. A wrench comprising a supported stationary ring provided with an opening at one side thereof, a rotatable jaw provided with a peripheral groove loosely accommo-v sitely branching arms and parallel standards suspended therefrom, a stationary supporting ring carried thereby and provided.

with an opening at one side thereof, a twopart rotatable jaw provided with a peripheral groove communicating with the outer edge thereof and loosely accommodating the supporting ring therein in a horizontally extending position, said jaw being provided vith a drill bit receiving slot adapted to register with the opening in the ring, said ring being provided with bottom recesses located within the area of the groove in the jaw, and roller bearings mounted in the recesses and engaging the bottom wall of the groove, to rotatably support the jaw.

8. A Wrench for applying and removing well drill bits, and other heavy machine parts comprising a suitably supported stationary ring provided with an opening at one side thereof, a rotatable jaw provided with a peripheral groove extending throughout the circumference thereof and loosely accommodating the supporting'ring between the top and bottom portions of the groove, said jaw being provided with a drill bit receiving slot passing through the peripheral surface thereof to register with the opening in the ring at times and adapted to be moved out of registry therewith, there being a space between the upper face of the ring and the top wall of the groove in the jaw and the ring being provided with bottom recesses radially extended and spaced apart around the ring within the area of the groove wholly within the top and bottom portions thereof, said ringprojecting without the groove and anti-friction rollers rotatably mounted in the recesses within the groove loosely and retained against outward displacement from the recesses to movably support the jaw thereon, the top wall of the groove resting on said rollers and said rollers provided with trunnions rotatably supported in the recesses, said rollers being designed to be exposed and removed for lu- V brication.

In testimony that I claim the foregoing as my own, I have hereto affixed my signature in the presence of two witnesses.

WILLARD L. sTovBB.

lVitnesses \V. W. CAMPBELL, S. T. HUBBARD. 

